And this is the version for sorcerers.
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Subterranean Dragon
You have the blood of a kind of dragons that long ago forfeited their wings to life underground and better watch over their treasures (like the adamantine dragon).
Associated Bloodline: Draconic.
Bloodline Arcana: Whenever you cast a spell with the earth descriptor, or a spell that affects metal, gems, or ore, you gain a number of temporary hit points equal to the spell’s level. These temporary hit points last 1 minute.
Bloodline Powers: You find wings useless to explore the deep mysteries of earth.
Burrow (Su): At 15th level, you gain a burrow speed of 30 feet. This bloodline power replaces wings.
Power of the Deep Wyrm (Su): At 20th level, you gain immunity to paralysis, sleep, and damage of your energy type. You also gain blindsense 60 feet and tremorsense 30 ft. This bloodline power modifies power of wyrms.